[Gmecm] GMLAN and Class 2

[Don Sauman]

Hi Steve

Is there any possibility that your circuit will allow scan analysis on a 
1999 Jeep Cherokee with VM 2.5lt diesel (appears to be OBD II)

Don

Steve Ravet wrote:

>Bill, take a look at the OBD2 info on the gmecm page:
>
>http://www.diy-efi.org/gmecm/ecm_info/obd2/
>
>The definitive references are the SAE documents.  I used to have them
>online but had to remove them when I got a certified letter from SAE.  I
>found them originally via google so you might be able to find them also.
>Or try a library.  J1850 is the electrical specification and you can
>find out all you need to know about it from the whitepapers and app
>notes on that page.  The other 2 documents have higher level
>information.
>
>For you or anyone else who is interested I am working on a board that
>will connect a GM OBD2 system to a computer via USB.  It has 2 chips and
>a BOM of about $30.  I've created the initial PCB which had some
>problems so I'm still debugging.  I'm hoping that if I provide the
>hardware and some basic software that others will run with it to create
>scan tools, editors, reflashers, etc.
>
>What are you contemplating?
>
>--steve
>
>  
>
>>-----Original Message-----
>>From: gmecm-bounces at diy-efi.org 
>>[mailto:gmecm-bounces at diy-efi.org] On Behalf Of Bill Shaw
>>Sent: Friday, September 29, 2006 1:23 PM
>>To: gmecm at diy-efi.org
>>Subject: [Gmecm] GMLAN and Class 2
>>
>>Anyone have any info on the GMLAN and Class 2 data busses in 
>>the C5 and
>>C6 Corvette? I'm specifically looking for communications 
>>protocols, data packet descriptions, command descriptions, 
>>interface chips, software or hardware tools for talking on 
>>the busses or monitoring data flow, that kind of stuff.
>>
>>Any info or pointers would be appreciated.
>>
>>Bill
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>>
>>    
>>
>
>
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Don Sauman
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